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Theorem filconn 22498
 Description: A filter gives rise to a connected topology. (Contributed by Jeff Hankins, 6-Dec-2009.) (Revised by Stefan O'Rear, 2-Aug-2015.)
Assertion
Ref Expression
filconn (𝐹 ∈ (Fil‘𝑋) → (𝐹 ∪ {∅}) ∈ Conn)

Proof of Theorem filconn
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 id 22 . . 3 (𝐹 ∈ (Fil‘𝑋) → 𝐹 ∈ (Fil‘𝑋))
2 filunibas 22496 . . . 4 (𝐹 ∈ (Fil‘𝑋) → 𝐹 = 𝑋)
32fveq2d 6650 . . 3 (𝐹 ∈ (Fil‘𝑋) → (Fil‘ 𝐹) = (Fil‘𝑋))
41, 3eleqtrrd 2893 . 2 (𝐹 ∈ (Fil‘𝑋) → 𝐹 ∈ (Fil‘ 𝐹))
5 nss 3977 . . . . . . . 8 𝑥 ⊆ {∅} ↔ ∃𝑦(𝑦𝑥 ∧ ¬ 𝑦 ∈ {∅}))
6 simpll 766 . . . . . . . . . . . 12 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) ∧ (𝑦𝑥 ∧ ¬ 𝑦 ∈ {∅})) → 𝐹 ∈ (Fil‘ 𝐹))
7 ssel2 3910 . . . . . . . . . . . . . . . . 17 ((𝑥 ⊆ (𝐹 ∪ {∅}) ∧ 𝑦𝑥) → 𝑦 ∈ (𝐹 ∪ {∅}))
87adantll 713 . . . . . . . . . . . . . . . 16 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) ∧ 𝑦𝑥) → 𝑦 ∈ (𝐹 ∪ {∅}))
9 elun 4076 . . . . . . . . . . . . . . . 16 (𝑦 ∈ (𝐹 ∪ {∅}) ↔ (𝑦𝐹𝑦 ∈ {∅}))
108, 9sylib 221 . . . . . . . . . . . . . . 15 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) ∧ 𝑦𝑥) → (𝑦𝐹𝑦 ∈ {∅}))
1110orcomd 868 . . . . . . . . . . . . . 14 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) ∧ 𝑦𝑥) → (𝑦 ∈ {∅} ∨ 𝑦𝐹))
1211ord 861 . . . . . . . . . . . . 13 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) ∧ 𝑦𝑥) → (¬ 𝑦 ∈ {∅} → 𝑦𝐹))
1312impr 458 . . . . . . . . . . . 12 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) ∧ (𝑦𝑥 ∧ ¬ 𝑦 ∈ {∅})) → 𝑦𝐹)
14 uniss 4809 . . . . . . . . . . . . . 14 (𝑥 ⊆ (𝐹 ∪ {∅}) → 𝑥 (𝐹 ∪ {∅}))
1514ad2antlr 726 . . . . . . . . . . . . 13 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) ∧ (𝑦𝑥 ∧ ¬ 𝑦 ∈ {∅})) → 𝑥 (𝐹 ∪ {∅}))
16 uniun 4824 . . . . . . . . . . . . . 14 (𝐹 ∪ {∅}) = ( 𝐹 {∅})
17 0ex 5176 . . . . . . . . . . . . . . . 16 ∅ ∈ V
1817unisn 4821 . . . . . . . . . . . . . . 15 {∅} = ∅
1918uneq2i 4087 . . . . . . . . . . . . . 14 ( 𝐹 {∅}) = ( 𝐹 ∪ ∅)
20 un0 4298 . . . . . . . . . . . . . 14 ( 𝐹 ∪ ∅) = 𝐹
2116, 19, 203eqtrri 2826 . . . . . . . . . . . . 13 𝐹 = (𝐹 ∪ {∅})
2215, 21sseqtrrdi 3966 . . . . . . . . . . . 12 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) ∧ (𝑦𝑥 ∧ ¬ 𝑦 ∈ {∅})) → 𝑥 𝐹)
23 elssuni 4831 . . . . . . . . . . . . 13 (𝑦𝑥𝑦 𝑥)
2423ad2antrl 727 . . . . . . . . . . . 12 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) ∧ (𝑦𝑥 ∧ ¬ 𝑦 ∈ {∅})) → 𝑦 𝑥)
25 filss 22468 . . . . . . . . . . . 12 ((𝐹 ∈ (Fil‘ 𝐹) ∧ (𝑦𝐹 𝑥 𝐹𝑦 𝑥)) → 𝑥𝐹)
266, 13, 22, 24, 25syl13anc 1369 . . . . . . . . . . 11 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) ∧ (𝑦𝑥 ∧ ¬ 𝑦 ∈ {∅})) → 𝑥𝐹)
27 elun1 4103 . . . . . . . . . . 11 ( 𝑥𝐹 𝑥 ∈ (𝐹 ∪ {∅}))
2826, 27syl 17 . . . . . . . . . 10 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) ∧ (𝑦𝑥 ∧ ¬ 𝑦 ∈ {∅})) → 𝑥 ∈ (𝐹 ∪ {∅}))
2928ex 416 . . . . . . . . 9 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) → ((𝑦𝑥 ∧ ¬ 𝑦 ∈ {∅}) → 𝑥 ∈ (𝐹 ∪ {∅})))
3029exlimdv 1934 . . . . . . . 8 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) → (∃𝑦(𝑦𝑥 ∧ ¬ 𝑦 ∈ {∅}) → 𝑥 ∈ (𝐹 ∪ {∅})))
315, 30syl5bi 245 . . . . . . 7 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) → (¬ 𝑥 ⊆ {∅} → 𝑥 ∈ (𝐹 ∪ {∅})))
32 uni0b 4827 . . . . . . . 8 ( 𝑥 = ∅ ↔ 𝑥 ⊆ {∅})
33 ssun2 4100 . . . . . . . . . 10 {∅} ⊆ (𝐹 ∪ {∅})
3417snid 4561 . . . . . . . . . 10 ∅ ∈ {∅}
3533, 34sselii 3912 . . . . . . . . 9 ∅ ∈ (𝐹 ∪ {∅})
36 eleq1 2877 . . . . . . . . 9 ( 𝑥 = ∅ → ( 𝑥 ∈ (𝐹 ∪ {∅}) ↔ ∅ ∈ (𝐹 ∪ {∅})))
3735, 36mpbiri 261 . . . . . . . 8 ( 𝑥 = ∅ → 𝑥 ∈ (𝐹 ∪ {∅}))
3832, 37sylbir 238 . . . . . . 7 (𝑥 ⊆ {∅} → 𝑥 ∈ (𝐹 ∪ {∅}))
3931, 38pm2.61d2 184 . . . . . 6 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ⊆ (𝐹 ∪ {∅})) → 𝑥 ∈ (𝐹 ∪ {∅}))
4039ex 416 . . . . 5 (𝐹 ∈ (Fil‘ 𝐹) → (𝑥 ⊆ (𝐹 ∪ {∅}) → 𝑥 ∈ (𝐹 ∪ {∅})))
4140alrimiv 1928 . . . 4 (𝐹 ∈ (Fil‘ 𝐹) → ∀𝑥(𝑥 ⊆ (𝐹 ∪ {∅}) → 𝑥 ∈ (𝐹 ∪ {∅})))
42 filin 22469 . . . . . . . . . 10 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥𝐹𝑦𝐹) → (𝑥𝑦) ∈ 𝐹)
43 elun1 4103 . . . . . . . . . 10 ((𝑥𝑦) ∈ 𝐹 → (𝑥𝑦) ∈ (𝐹 ∪ {∅}))
4442, 43syl 17 . . . . . . . . 9 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥𝐹𝑦𝐹) → (𝑥𝑦) ∈ (𝐹 ∪ {∅}))
45443expa 1115 . . . . . . . 8 (((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥𝐹) ∧ 𝑦𝐹) → (𝑥𝑦) ∈ (𝐹 ∪ {∅}))
4645ralrimiva 3149 . . . . . . 7 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥𝐹) → ∀𝑦𝐹 (𝑥𝑦) ∈ (𝐹 ∪ {∅}))
47 elsni 4542 . . . . . . . . 9 (𝑦 ∈ {∅} → 𝑦 = ∅)
48 ineq2 4133 . . . . . . . . . . 11 (𝑦 = ∅ → (𝑥𝑦) = (𝑥 ∩ ∅))
49 in0 4299 . . . . . . . . . . 11 (𝑥 ∩ ∅) = ∅
5048, 49eqtrdi 2849 . . . . . . . . . 10 (𝑦 = ∅ → (𝑥𝑦) = ∅)
5150, 35eqeltrdi 2898 . . . . . . . . 9 (𝑦 = ∅ → (𝑥𝑦) ∈ (𝐹 ∪ {∅}))
5247, 51syl 17 . . . . . . . 8 (𝑦 ∈ {∅} → (𝑥𝑦) ∈ (𝐹 ∪ {∅}))
5352rgen 3116 . . . . . . 7 𝑦 ∈ {∅} (𝑥𝑦) ∈ (𝐹 ∪ {∅})
54 ralun 4119 . . . . . . 7 ((∀𝑦𝐹 (𝑥𝑦) ∈ (𝐹 ∪ {∅}) ∧ ∀𝑦 ∈ {∅} (𝑥𝑦) ∈ (𝐹 ∪ {∅})) → ∀𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅}))
5546, 53, 54sylancl 589 . . . . . 6 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥𝐹) → ∀𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅}))
5655ralrimiva 3149 . . . . 5 (𝐹 ∈ (Fil‘ 𝐹) → ∀𝑥𝐹𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅}))
57 elsni 4542 . . . . . . 7 (𝑥 ∈ {∅} → 𝑥 = ∅)
58 ineq1 4131 . . . . . . . . . 10 (𝑥 = ∅ → (𝑥𝑦) = (∅ ∩ 𝑦))
59 0in 4301 . . . . . . . . . 10 (∅ ∩ 𝑦) = ∅
6058, 59eqtrdi 2849 . . . . . . . . 9 (𝑥 = ∅ → (𝑥𝑦) = ∅)
6160, 35eqeltrdi 2898 . . . . . . . 8 (𝑥 = ∅ → (𝑥𝑦) ∈ (𝐹 ∪ {∅}))
6261ralrimivw 3150 . . . . . . 7 (𝑥 = ∅ → ∀𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅}))
6357, 62syl 17 . . . . . 6 (𝑥 ∈ {∅} → ∀𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅}))
6463rgen 3116 . . . . 5 𝑥 ∈ {∅}∀𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅})
65 ralun 4119 . . . . 5 ((∀𝑥𝐹𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅}) ∧ ∀𝑥 ∈ {∅}∀𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅})) → ∀𝑥 ∈ (𝐹 ∪ {∅})∀𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅}))
6656, 64, 65sylancl 589 . . . 4 (𝐹 ∈ (Fil‘ 𝐹) → ∀𝑥 ∈ (𝐹 ∪ {∅})∀𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅}))
67 p0ex 5251 . . . . . 6 {∅} ∈ V
68 unexg 7455 . . . . . 6 ((𝐹 ∈ (Fil‘ 𝐹) ∧ {∅} ∈ V) → (𝐹 ∪ {∅}) ∈ V)
6967, 68mpan2 690 . . . . 5 (𝐹 ∈ (Fil‘ 𝐹) → (𝐹 ∪ {∅}) ∈ V)
70 istopg 21510 . . . . 5 ((𝐹 ∪ {∅}) ∈ V → ((𝐹 ∪ {∅}) ∈ Top ↔ (∀𝑥(𝑥 ⊆ (𝐹 ∪ {∅}) → 𝑥 ∈ (𝐹 ∪ {∅})) ∧ ∀𝑥 ∈ (𝐹 ∪ {∅})∀𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅}))))
7169, 70syl 17 . . . 4 (𝐹 ∈ (Fil‘ 𝐹) → ((𝐹 ∪ {∅}) ∈ Top ↔ (∀𝑥(𝑥 ⊆ (𝐹 ∪ {∅}) → 𝑥 ∈ (𝐹 ∪ {∅})) ∧ ∀𝑥 ∈ (𝐹 ∪ {∅})∀𝑦 ∈ (𝐹 ∪ {∅})(𝑥𝑦) ∈ (𝐹 ∪ {∅}))))
7241, 66, 71mpbir2and 712 . . 3 (𝐹 ∈ (Fil‘ 𝐹) → (𝐹 ∪ {∅}) ∈ Top)
7321cldopn 21646 . . . . . . . 8 (𝑥 ∈ (Clsd‘(𝐹 ∪ {∅})) → ( 𝐹𝑥) ∈ (𝐹 ∪ {∅}))
74 elun 4076 . . . . . . . 8 (( 𝐹𝑥) ∈ (𝐹 ∪ {∅}) ↔ (( 𝐹𝑥) ∈ 𝐹 ∨ ( 𝐹𝑥) ∈ {∅}))
7573, 74sylib 221 . . . . . . 7 (𝑥 ∈ (Clsd‘(𝐹 ∪ {∅})) → (( 𝐹𝑥) ∈ 𝐹 ∨ ( 𝐹𝑥) ∈ {∅}))
76 elun 4076 . . . . . . . . . 10 (𝑥 ∈ (𝐹 ∪ {∅}) ↔ (𝑥𝐹𝑥 ∈ {∅}))
77 filfbas 22463 . . . . . . . . . . . . . 14 (𝐹 ∈ (Fil‘ 𝐹) → 𝐹 ∈ (fBas‘ 𝐹))
78 fbncp 22454 . . . . . . . . . . . . . 14 ((𝐹 ∈ (fBas‘ 𝐹) ∧ 𝑥𝐹) → ¬ ( 𝐹𝑥) ∈ 𝐹)
7977, 78sylan 583 . . . . . . . . . . . . 13 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥𝐹) → ¬ ( 𝐹𝑥) ∈ 𝐹)
8079pm2.21d 121 . . . . . . . . . . . 12 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥𝐹) → (( 𝐹𝑥) ∈ 𝐹𝑥 = ∅))
8180ex 416 . . . . . . . . . . 11 (𝐹 ∈ (Fil‘ 𝐹) → (𝑥𝐹 → (( 𝐹𝑥) ∈ 𝐹𝑥 = ∅)))
8257a1i13 27 . . . . . . . . . . 11 (𝐹 ∈ (Fil‘ 𝐹) → (𝑥 ∈ {∅} → (( 𝐹𝑥) ∈ 𝐹𝑥 = ∅)))
8381, 82jaod 856 . . . . . . . . . 10 (𝐹 ∈ (Fil‘ 𝐹) → ((𝑥𝐹𝑥 ∈ {∅}) → (( 𝐹𝑥) ∈ 𝐹𝑥 = ∅)))
8476, 83syl5bi 245 . . . . . . . . 9 (𝐹 ∈ (Fil‘ 𝐹) → (𝑥 ∈ (𝐹 ∪ {∅}) → (( 𝐹𝑥) ∈ 𝐹𝑥 = ∅)))
8584imp 410 . . . . . . . 8 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ∈ (𝐹 ∪ {∅})) → (( 𝐹𝑥) ∈ 𝐹𝑥 = ∅))
86 elsni 4542 . . . . . . . . 9 (( 𝐹𝑥) ∈ {∅} → ( 𝐹𝑥) = ∅)
87 elssuni 4831 . . . . . . . . . . . 12 (𝑥 ∈ (𝐹 ∪ {∅}) → 𝑥 (𝐹 ∪ {∅}))
8887, 21sseqtrrdi 3966 . . . . . . . . . . 11 (𝑥 ∈ (𝐹 ∪ {∅}) → 𝑥 𝐹)
8988adantl 485 . . . . . . . . . 10 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ∈ (𝐹 ∪ {∅})) → 𝑥 𝐹)
90 ssdif0 4277 . . . . . . . . . . 11 ( 𝐹𝑥 ↔ ( 𝐹𝑥) = ∅)
9190biimpri 231 . . . . . . . . . 10 (( 𝐹𝑥) = ∅ → 𝐹𝑥)
92 eqss 3930 . . . . . . . . . . 11 (𝑥 = 𝐹 ↔ (𝑥 𝐹 𝐹𝑥))
9392simplbi2 504 . . . . . . . . . 10 (𝑥 𝐹 → ( 𝐹𝑥𝑥 = 𝐹))
9489, 91, 93syl2im 40 . . . . . . . . 9 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ∈ (𝐹 ∪ {∅})) → (( 𝐹𝑥) = ∅ → 𝑥 = 𝐹))
9586, 94syl5 34 . . . . . . . 8 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ∈ (𝐹 ∪ {∅})) → (( 𝐹𝑥) ∈ {∅} → 𝑥 = 𝐹))
9685, 95orim12d 962 . . . . . . 7 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ∈ (𝐹 ∪ {∅})) → ((( 𝐹𝑥) ∈ 𝐹 ∨ ( 𝐹𝑥) ∈ {∅}) → (𝑥 = ∅ ∨ 𝑥 = 𝐹)))
9775, 96syl5 34 . . . . . 6 ((𝐹 ∈ (Fil‘ 𝐹) ∧ 𝑥 ∈ (𝐹 ∪ {∅})) → (𝑥 ∈ (Clsd‘(𝐹 ∪ {∅})) → (𝑥 = ∅ ∨ 𝑥 = 𝐹)))
9897expimpd 457 . . . . 5 (𝐹 ∈ (Fil‘ 𝐹) → ((𝑥 ∈ (𝐹 ∪ {∅}) ∧ 𝑥 ∈ (Clsd‘(𝐹 ∪ {∅}))) → (𝑥 = ∅ ∨ 𝑥 = 𝐹)))
99 elin 3897 . . . . 5 (𝑥 ∈ ((𝐹 ∪ {∅}) ∩ (Clsd‘(𝐹 ∪ {∅}))) ↔ (𝑥 ∈ (𝐹 ∪ {∅}) ∧ 𝑥 ∈ (Clsd‘(𝐹 ∪ {∅}))))
100 vex 3444 . . . . . 6 𝑥 ∈ V
101100elpr 4548 . . . . 5 (𝑥 ∈ {∅, 𝐹} ↔ (𝑥 = ∅ ∨ 𝑥 = 𝐹))
10298, 99, 1013imtr4g 299 . . . 4 (𝐹 ∈ (Fil‘ 𝐹) → (𝑥 ∈ ((𝐹 ∪ {∅}) ∩ (Clsd‘(𝐹 ∪ {∅}))) → 𝑥 ∈ {∅, 𝐹}))
103102ssrdv 3921 . . 3 (𝐹 ∈ (Fil‘ 𝐹) → ((𝐹 ∪ {∅}) ∩ (Clsd‘(𝐹 ∪ {∅}))) ⊆ {∅, 𝐹})
10421isconn2 22029 . . 3 ((𝐹 ∪ {∅}) ∈ Conn ↔ ((𝐹 ∪ {∅}) ∈ Top ∧ ((𝐹 ∪ {∅}) ∩ (Clsd‘(𝐹 ∪ {∅}))) ⊆ {∅, 𝐹}))
10572, 103, 104sylanbrc 586 . 2 (𝐹 ∈ (Fil‘ 𝐹) → (𝐹 ∪ {∅}) ∈ Conn)
1064, 105syl 17 1 (𝐹 ∈ (Fil‘𝑋) → (𝐹 ∪ {∅}) ∈ Conn)
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 399   ∨ wo 844   ∧ w3a 1084  ∀wal 1536   = wceq 1538  ∃wex 1781   ∈ wcel 2111  ∀wral 3106  Vcvv 3441   ∖ cdif 3878   ∪ cun 3879   ∩ cin 3880   ⊆ wss 3881  ∅c0 4243  {csn 4525  {cpr 4527  ∪ cuni 4801  ‘cfv 6325  fBascfbas 20083  Topctop 21508  Clsdccld 21631  Conncconn 22026  Filcfil 22460 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-sep 5168  ax-nul 5175  ax-pow 5232  ax-pr 5296  ax-un 7444 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-nel 3092  df-ral 3111  df-rex 3112  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-op 4532  df-uni 4802  df-br 5032  df-opab 5094  df-mpt 5112  df-id 5426  df-xp 5526  df-rel 5527  df-cnv 5528  df-co 5529  df-dm 5530  df-rn 5531  df-res 5532  df-ima 5533  df-iota 6284  df-fun 6327  df-fn 6328  df-fv 6333  df-fbas 20092  df-top 21509  df-cld 21634  df-conn 22027  df-fil 22461 This theorem is referenced by:  ufildr  22546
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